Web Definitions:

fateful: having momentous consequences; of decisive importance; "that fateful meeting of the U.N. when...it declared war on North Korea"- Saturday Rev; "the fatal day of the election finally arrived"

black: (of events) having extremely unfortunate or dire consequences; bringing ruin; "the stock market crashed on Black Friday"; "a calamitous defeat"; "the battle was a disastrous end to a disastrous campaign"; "such doctrines, if true, would be absolutely fatal to my theory"- Charles Darwin; " ...

controlled or decreed by fate; predetermined; "a fatal series of events"

(fatally) with fatal consequences or implications; "he was fatally ill equipped for the climb"

Fatal is an album by Hussein Fatal, recorded in 1999 and released in 2002.

FATUS (Foreign Agricultural Trade System of the United States) is a system of more than 200 trade codes created and maintained by USDA’s Economic Research Service to summarize U.S. agricultural trade in a form accessible to the public. ...

Proceeding from, or appointed by, fate or destiny; Foreboding death or great disaster; Causing death or destruction; Causing a sudden end to a program

(fatally) In a fatal manner; lethally; Ultimately, with finality or irrevocability, moving towards the demise of something; Fatedly; according to the dictates of fate or doom

Deadly or mortal; destructive; devastating.

something that results in death.

means "annoying" in German

fatal; mortal; gravísimo

(Tragic) Flaw—some INNER quality that brings about the downfall of the protagonist (ambition, greed, laziness, …); it may be a mistake in judgment or following bad advice but nonetheless tragedy ensues. The ancient Greeks felt “the fates” were involved.